Feeding device for shaping presses



March 13, 1928.

S. F. TOJEK FEEDING DEVICE FOR SHAPING PRESSES `March 13, 1928.

s. F. ToJEK FEEDING DEVICE FOR SHAPING PRESSES Filed Aug. 2. 192e.lli/g3.

3 Sheets-Sheet 2 A TTORNE Y.

March 13, 1928.

S. F. TOJEK FEEDING DEVICE FOR SHAPING PRESSES 3 Sheets-Sheet 5INVENTOR.

ATTORNEY.

Filed Aug. 2. 1926 Patented Mar. 13, 1928.

unirse stares ...PATENT ortica.

STEPHEN F. TOJEK. 0F MILWAUKEE, WISCONSIN, lASSIGNOE, T0 STEPHEN E.TOJEK AND PHILIP 'TO-TEK, COPARTNERS DOING BUSINESS UNDER THE kFltlvlfNAME AND f STYLE 0F TOJ'EK BROTHERS, OF MILITAUKEE, WISCONSIN. i

FEEDING DEVICE FOR 'SHAPING PRESSES.

'My invention relates toimprovements in feeding; devices for shapingpresses, of that class in which a plurality of thin disks or blanks ofpaper or similar' material are to be deliveredfrom `the .bottomroii apile or stack to a shaping press 'having a die in which the superposedblanks may be simultaneously shaped by a single operation ot the pressplunger.

The object of this invention is to provide `improved means for Jfeedingthe blanks from the bottom of the pile tothe press in vsynchronism lwiththe. movements of the press plunger.

There are two stages `ot the blank feeding operation, i.re., theseparating stage. which involves fa separation of a desired number orYbundle of blanks from the bottom ot the pile in the magazine and thevfeeding stage which involves a delivery of the separated blanks from alower or base portion o'l the magazine lto Jthe press. The separation of-the blanks is accomplished by a set of bladesfcarried by a slidesimilar to 'that disclosed in Letters Patent to H. C. lllairrvey, No.1,238,138, dated August .28: 191

Specifically stated, the Vprimary object ot' `this invention is toprovide means wherehy the press will automatically actuate and controlthe separator blades to deliver a bundle ot blanks into the path of afeed jblock or follower which is 'then also automatically actuated todeliver' the blanks to the press in a quick initial movement, followedby a progressiveV retardation and substantially a final dwell as theblanks are positioned upon the die, the follower being,r then retractedby a spring and with a quick throw, in time for the next blank separating stage of the feeding operation. `This `enables `me to operate the'press and feeder 'ata 4*high rate of speed, the only retarded movementbeing that required for accurately positioningr the blanks on the die.

Another object 4of this invention is 'to `providea `feeder which isadjustable for feeding blanks of diierent sizes. V

In the drawings:

Figure ly isa front elevation of a. machine embodying my invention, themachine illustrated beingused in the manufacture of paper cups, andkportionsof the feedingr mechanism and magazine being' broken away orillustrated in vertical section.

Figure 2 yis a plan view of the base portion of the magazine. sho-wingthesepara tor blades and slide, with associated `parts,`

the magazine posts beingy shown in cross `section.

Figure 3 is a side elevation of the machine as 'viewed 'from theright-'hand side in Figure l.

Figurefa is a' plan view `of 4the *feeding mechanism.

Like parts are identified ftheV same reference characters throughout theseveral views. i i

ll. which is guided by the verticalgposts `l2 and-:actuated from Stheoverhead shaft 13 `through crank llkconnecting rod 15 (Figure that avariety of dies of` dili'eringr sizes and shapes maybe usedinterchangeably. Tbopaper blanks are stored in th form 0f apile'oi"superposed blanks in a magazine composed of a set ot verticalrods 25 socketed in the bottom plate 26 of the magazine Aor teeder base.which is mounted on` the table 1 8. These blanks are normally supportedvon a blade 27 which is adiustably secured to a slide 28 by bolts 29,vwhich passthrough slots 30 in the blade, as clearly shown in Figure 2.rThe slide 28 is mounted for horizontalmovement lin suitable guideways3l formed on the hase plaie QG. By letl'actling this slide (to illeright in Figure 2), the blade Q7 may be withdrawn fronl beneath the pileof blanks, and ille blanks will tlllls be allowed to drop upon anotherblade 35 sin'lilarly secured by bolts "29 to the opposite end of thesaule slide, but at a lower level. The blades QT and 35 lic inhorizontal planes, which ale separated vertically to an extentcorresponding: witll ille height of thc bundle of superposed blanks iobe fed to i'he press by a sinale feeding operation. Therefore, when thepile of blanks ill ille magazine has been allowed to descend b v gravityto ille blade a return lllovenlent of the slide Q8 will cause ille point2T of the blade 7 to enter ille pile of blanks at ille desired heightabove its bottonl to separate those blanks below tllis blade Il' frolllthose above it. Sinnli- 'tancousll' witll tllis separatingr lllovelnentof ille blade 27. ille blade 35 will be withdrawn, whereupon ille selaratcd blanks will be perllliticd io drop into a feedway 37 fornled byille plaie 26. and a set of adjustable side all nlelnbers and whichteedway extends rearwardly to guide ille blanks to ille die 17.

The blanks are pushed alone' this feedway 3T by a follower or pllsllerblock 3S, wllicll is provided witll an actuatingr arnl 39 extending;downwardly through a slot in the plaie '26 and table 18 and connectedwith the elbowed slide bar f1.0. The side walls i1 and 4Q of illefecdway are adjustable to increase or dilninisll ille width of illeguideway ill accordance with ille size of the blanks whicll are being`fed. Each wall comprises a flanged portion of a plaie 44 havinglaterally-extending slots through whicll bolts 45 nlay pass to secllrethese plaies 44 to the plate 26.

The slide Q8 is similar to that sllown in said patent to Harvey. Alsoille separating blades 27 ant the actuating' crank arnl 50 alldassociated latch har 51, with ille headed catch pin 53 on ille bladecarrying slide, the latcll operating spring 54. ille oblique throwoutarlll abutment pin 56. slide reiracting weight 57 and associated cable58, are subsiantiall.,v disclosed in said patent .and require no furtherdescription. Bilt in illy illlproved structure ille crank arnl 50 isconneeted with ille latcll bar 51 by a stud 65 adjusiably engaged in thelongitudinally e.\'tcndinr crank slot G6 whereby the stroke of illeslide nlay he varied in accordance with ille size of ille blanks to befed. This crank arlll 5t) is acillated from the vertical feeder shaft 67through the disk GS, crank pin 69, connectingF link 70, slotted crank 71and vertical shatt 72, the link bar 70 being' adjustably pivoted in theslot of crank 71 by a pivot bolt 78.

The feed block or follower 38 will also be reciprocated along illefeedway by ower derived from ille vertical shaft 67, this shaft beinerdriven fronl ille shaft. 13 through ille bevel fears 75 and 7G. Theconnections for translnitiiney nlotion fronl this shaft to the feedblock or follower 3S will not he described.

To actuate ille, feed block or follower 39 for feeding ille separatedblanks io the dies of ille press the shaft G7 is provided with a eanlSil having a bearing surface Si adapted io engage :l roller 9:2 on asind S73 lnollllied on a lever Sli-t connected with ille llndcr sur-I'ace of ille table by a fulcrlun pill S5. This lever is nornlally heldin ille position ill which it is illustrated by full lines ill Fig. ure4, by nleans of a` springr 86. wllicll connects itl witll the table atS7, hllt when the lever is swung from this position by ille pressure ofthe can'l Si) against the stud roller 82. nlotion is transmitted to illefccd block or follower 38 through ille lillk 90` level' 9], and lillk92. ille latter being pivoi'ally conueeicd to ille elhowcd slide llar40. This nlotioll will continue until ille level' 9i has been swung tothe position ill which it is indicated hiv dotted lines in Figure Il.The bearing surface S1 of ille canl will be so contoured illat illefinal nloven'lent of ille lever 91 and ille associated follower B8 willbe relatively slow as the portion 93 of ille cani passes the roller 82.At this tillle the blanks will he placed by ille follower in position onthc die 17. There will tllen be a slight dwell ill ille nlovcnlent ofthe follower' until the elld of ille calll passes ille loller SQ,whereupon ille sprin; lr Sti will instantly restore thc levers Si and 91to their nol'lllal position with the feed block or follower 38retracted.

lVhen ille lever 91 is ill ille dotted lille position of Figure 4, illefeed block will have nloved illwardly or rearwardlyv alld will havecarried the separated pile of blanks io a sliperposcd position on thedie lnenlhcr 17. The illller face of the follower is concavely cllrvedill substantial confornliiy to ille peripheral contour of the blanks.lVheu blanks of different dianleiers are io be fed. the .side walls ofille slideway are correspondingly adjusted as above explained, alld afollower 38 of appropriate size. will, of course. he substituted for theone shown in the drawings. and in order that ille range of nlovcnlent ofille follower nlay he varied to correspond with variations in thediametersof the blanks that ale beine; fed, ille lever 91 is forllledill overlapping sections, one of which is longitudinally slotted andconnected to ille other by set screws 94. By adjustinfr these sectionsupon each other and securing ihcln tofreiher by ille set screws 94- intheir newly ad]usted positions, the stroke of the follower may be variedin proportion to ille increased or diminished length of the lever 91.

The position of the canl 8O on the shaft G7 is sllch that it will notactuate the lever 84 RLL.

Uil

llltl llll and its associated connections with the follower 38 untilafter the separator slide has been released from the latch bar 51 andretracted by the weight 57 to deliver the separated bundle of blanksinto the feedway. But when this has been accomplished, the cam 80 willactuate the follower with a quick but controlled stroke, the movement ofthe cam actuated stud 83 being multiplied in the compound levermechanism above described. But as the blanks approach the receiving diei7, the motion of the follower is progressively retarded after the cambearing point 93 reaches the stud roller 82, and the contour of the endof the cam is such that the final movement of the follower is scarcelyperceptible, there being substantially a dwell just before the end ofthe cam clears the roller 82. Thereupon the abrupt face 96 of the camallows a substantially instantaneous retraction of the follower underthe recoil of the spring 86.

I claim:

l. Ina shaping press for blanks of paper and similar material, saidpress having a driven rotary shaft, the combination of a magazine forthe blanks, means operated from said shaft for separating bundles ofsuperposed blanks from those in the magazine, a reciprocatory feedingdevice for delivering the bundles of blanks successively to the press,compound lever mechanism for actuating said feeding device, and a cam onsaid rotary shaft adapted to actuate the power arm of said compoundlever mechanism once during each turn of the shaft.

Q. The combination with a rotary driven shaft, of a drawing press, of amagazine adapted to receive a pile of supcrposedL blanks to be fed tosaid press, a cam on said shaft, an associated lever provided with abearing to be engaged by said cam once during each revolution of theshaft to actuate said lever, compound lever mechanism for multiplyingthe movement imparted by said cam, a lfeeding slide for deliveringblanks from said magazine, and link connections between said feedingslide and fthe driven member of said compound mechanism.

In a shaping press, the combination of a pivoted lever provided with a.laterally projecting stud, a press operated rotary cam adapted totransmit motion to the lever through said stud, a. reciproeatory feedslide for delivering material to the press, and motion amplifyingconnections for transmitting movement from said lever to the feed slide.i

4. The combination with the stationary die of a shaping press, of a`feed table, a magazine having a base' portion mounted onmsaid table andprovided wit-h a. slide\vay, the walls of which are adjustable toincrease or diminish the width of the slideway, means for successivelydelivering bundles of blanks from the upper portion of the magazine tosaid slideway, a follower reciprocable in said slideway to deliver saidbundles ofblanks to the press, and press actuated means forreciprocating' said follower in timed relation to the movements of thepress and the bundle separating devices.

5.The combination with the stationary die of a shaping pressof a feedtable, a magazine having a base portion mounted on said table andprovided with a slideway, the walls of which are adjustable to increaseor diminish the width of the slideway, means for successively deliveringbundles of blanks from the upper portion of the magazine to saidslidcway, a follower reciprocable in said slideway to deliver saidbundles of blanks to the press, press actuated means for reciprocatingsaid follower in'timed relation to the movements of the press and thebundle separating devices, said press actuated means including acompound lever mechanism linked to the follower and press actuated camfor moving the lever mechanism in one direction, and a spring forretracting said mechanism when released by the cam,V

(i. The combination with a shaping press, of an expansible magazine forstoring blanks to be fed to the press for shaping operations, anexpansible slideway adapted to receive the blanks from the storageportion ot' the magazine, press controlled means for delivering bundlesof blanks from the magazine to the slideway and subsequently deliveringthem to the press in timed relation to the movements of the press, andindependent means for retracting the blank separating and deliveringmechanisms.

`STEPHEN F. ToJEK.

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